Throttle-valve.



E. DE H. CALDWELL.

` THROTTLE VALVE. APPLIoAToN FILED SEPT, 9, 1907.

Patented. Mar. 22, 1910.

frz/06232775.71.'

EDWIN DE H. CALDWELL, V0l? SI'. CHARLES MENTS, T0 THE, WEBB JAY MQTOR C ,i ILLINIS, ASSEGNOR, BY-MESNE ASSIGN'- OIVIPANY, A CORPORATION QF liltNE.

Specification of Letters Patent.

Patented Mar. 22, Y119111).,

applicati@ nledlsepteaiber 9, 1907. Serial No. 391,955.

To all 'whom 'it may concern." I

Beitknovvn that 1, EDWIN nu H. CALD- WELL, a citizen of the United States, residing at St. (lharles, in the county of Kane and State of illinois, have invented certain new and useful Improvements in Throttle- Valves, of which the following is a speciication.

My invention relates to throttle Valves for elastic duid motors, on-e feature being a doubleclosure by which greater accuracy of adjustment ma be obtained.

'Another eature of ymy invention comi .prises means for balancingthe Apressure on the' movable member of the v alve.

Another feature of the invention lies in a removable valve seat.

These and various other objects of my invention will be apparent in thel following specification and claims.

- Referring to the dravvings-Figurel represents a' longitudinalv section of my improved throttle valve Fig. 2 is a side elevation thereof.; and Fig. 3 is a section on the line 3of Fig. 1 look1ng in the direction of thev arrow. p

'-lhe cylindrical valve casin yl5 is closedat one end by a removable heat 16 and at the opposite end has an opening 17 which forms a part of the pressure fluid conduit. Another opening from the cylindrical chamber is afforded by the nipple 18. This connects by a V-shaped opening 188, which has its point or apex directed to the left as is clearly shown in Fig. 2. With'n the said chamber is a reciprocating member 19 with a puppet valve member. 20 rigidly attached thereto.

, The ring 21 is fitted 1nto the countersink 22 inthe opening 17 and constitutes a seat for the valve member 20.

Alongitudinal groove or slot 23 is cut in the side Wall of the chamber 15 and the projection or tongue 21 fromthe reciprocating member 19' extends into said slot. A branch 'passage 25 is cut through the reciprocating member 19 from the said slot 23 to the cham,- ber 26. The reciprocating member 19 has a Scre\\'threaded socket, as shown, and the chamber 2G, ust referred to, is at the bottom of the socket. An operating stem 29 extends through the outside into the cylindrical chamber and terminates in a screw-threaded portion ,28, -which coacts with the socket in the reciprocating member 19. The stem 29 is surrounded by a packing gland 30 and carries an opposed shoulder 32 which rests upon the cylinder head opening 31. Packing 33 is interposed between the gland 30 and the shoulder 32.

The drawings illustrate the throttle valve in closed position. When it is desired to open it the stem 29 is rotated by any conf venient means and thus the reciprocating member 19 is drawn to the right. The puppet Valve member 2O thus reced'es from its valve seat 21 and opens the passage 17. After this the apex of the V-shaped opening 27 is uncovered, this permitting a very restricted llow of pressure fluid. Further movement of the reciprocating member 19 by means of the operating stem 29 Will increase the uncovered area at 18a tent desired. It will be seen that adjustment of opening may be means of the sliding member 19 coacting with the V-shaped opening 18a, but that an absolutely tight closure is obtained between a very fine secured by p the members 20 and 21.

To prevent the reciprocating member 19 from rotating, the tongue and slot structure 24 and 23 is-provided, and to secure a perfect balancing of the elastic fluid pressure on the reciprocating member 1.9, the branch passage 25 is' provided. It will be noted that the tongue 24 tits loosely in the slot 23 and thus the right-hand end of the cylindrical chamber 15, as Well as the cavity 26 are subjected to the same pressure as that in the left-hand end of the 'cylindrical chamber 15, and the reciprocating member 19 1s balanced.

The valvev seat 21 has an internal diameter slightly less than that of'the conduit 17 so that 1t presents Aa projecting shoulder by which it may readily be removed, by beto any exr ing driven into the chamber 15. Moreover,

the axial thickness of the ring seat 21 is less than 'the depthof the countersink in Which it is fitted so that a shoulder 22 stands over the ring, and may be beaded down upon it to hold it in place.

By forcing the gland 30 down upon the acking 33, the shoulder 32 is held tightly down on the seat 31 and thus the valve stem vis packed and at the same time held delinitely against a reciprocatory movement.

' a valve Which slides or rotates.

I claim:

1. A throttle valve comprising a cylindrical chamber, an end opening and a sidel opening therefor, and a reciprocatory member Within the chamber adapted to seat from Within on the end opening and to slide over the side opening.

2. A throttle valve comprising a cylindrical chamber, an end opening and a V- shaped side openin therefor, .and a recipro eating member wit 1in the chamber adapted to seat from Within on the end opening and to slide over the side opening.

3. A throttle valve comprising, a cylindrical chamber, an end opening therefor, a reciprocating member Within the chamber adapted to seat from Within on the end opening, a longitudinal slot in the cylinder Wall, and a projection from the reciprocating member into the slot.

4. A throttle Valve comprising a cylindrical chamber, an end opening therefor, a-

reciprocating member within the chamber adapted to seat on the end opening, and passages from the end of the chamber adjacent to said end openin to the other end, whereby said other end 1s subjected over its entire area to the same pressure as that Ladjacent to said end o ening.

5. A throttle va ve comprising a cylindrical chamber, an end opening-therefor, a reciprocating,member Within the chamber Aadapted to seat on the end opening, a stem extending into the end of the chamber opposite said end opening and engaging the reciprocating member, and a passage to conduct pressure Huid from the region of the seance end opening to act between the reciprocating member anv the stem.

(. "A throttle valve comprising a cylindrical chamber, 'an end opening therefor, a

reciprocating member Within the chamber adapted to'seat on the end opening, an internally screw-threaded socket in the opposite end of the reciprocating member, a coacting externally Screvv-threaded stem pro- `jecting into the socket, and -a passage from the socket to the region adjacent the said end opening.

7. A throttle valve comprising a, cylindrical chamber, an end opening therefor, a reciprocating member Within the chamber ada ted to seat on the end opening, a longitudmal slot in the cylinder wall, a. socket in the opposite end of the reciprocating mem* ber, and a passage'through the reciprocating member from the slot to the socket.

8. In a throttle valve of the puppet type, a Valve chamber, a countersunk conduit leading therefrom, and a ring valve seat in the countersink havin its axial thickness less than the depth of t e countersink.

9. In a throttle valve of the puppet type. a valve chamber, a countersunk conduit leading therefrom, a ring valve seat in the countersink having its internal diameter less than the normal diameter of the conduit, and having its axial thickness less than the depth of the countersink.

10. In a throttle valve, a cylindrical chamber, a reciprocating member therein, a rotatable stem extending through the cylinder head and operatively connected .to the reciprocating member, a shoulder on said stem seated against the cylinder head, packing about the stem beyond the shoulder, and means extending from the cylinder to press the packing and the shoulder against the cylinder head.

- EDWIN DE H. CALDIVELIJ.

l/Vitnesses:

J ENNIE A. MACEDWARD, IJILLIAN lKlein. 

